3S Power Bank Enclosure Kit

Create a professional, compact and rugged 3D-printable enclosure for a rechargeable power bank. ELECTRICAL CONFIGURATION: - 3 × 3.7 V 7200 mAh lithium batteries - Battery arrangement: 3S1P - Nominal battery voltage: 11.1 V - Maximum charging voltage: 12.6 V - Total capacity: 7200 mAh - Approximate stored energy: 80 Wh ENCLOSURE DESIGN: Create the enclosure as TWO separate printable parts: 1. Main bottom housing 2. Removable top cover The enclosure must contain three individual battery compartments arranged in a straight 3S configuration. Add internal supports so the batteries cannot move inside the case. Include dedicated internal mounting space for: - 3S lithium-ion BMS - DC-DC power conversion/charging circuitry - USB-C module - USB-A output module - Digital battery percentage/voltage display - Power switch - DC connector EXTERNAL PORTS: Place the following on the front/side panel: - USB-C port - USB-A port - Digital display window - Power switch - DC input/output connector Make the USB ports and DC connector openings accurately sized for their respective modules. MECHANICAL DESIGN: - Wall thickness: 2.5–3 mm - Rounded external corners - Internal reinforcement ribs - Screw bosses for joining the top and bottom - M3 screw holes - Ventilation openings where appropriate - Cable-routing channels inside the enclosure - Strain relief around external connectors - Battery retention supports - Minimum 0.3 mm clearance between mating printed parts - No overlapping or self-intersecting geometry - All parts must be watertight/manifold and suitable for FDM 3D printing Make the design parametric so the battery compartment, PCB compartment and external dimensions can be changed later. The final design should look like a professional commercial power bank rather than a simple rectangular box. OUTPUT: Generate separate printable files for: - Bottom housing - Top cover - Optional internal battery spacers - Optional mounting brackets Export in STL and preferably STEP/3MF format. IMPORTANT: Do not guess the battery, BMS or PCB dimensions. Create editable parameters for their length, width and height so the exact measurements can be entered before final STL export.

Parameters

Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.